Design, Synthesis, and Opioid Receptor Binding of Some Novel Benzazepine Constrained Leucine Enkephalin Mimetics
摘要:
An N-substituted 2-benzazepine, previously reported to possess morphine-like analgesic activity in vivo, was adapted for use as a constrained mimic of the N-terminal residues of leucine enkephalin. Molecular modeling was used to evaluate the suitability of the 2-benzazepine nucleus for this purpose. The principle peptide constraint structure, 2-(7-methoxy-2,3,4,5-tetrahydro-1H-2-benzazepin-2-yl)-ethanoic acid (8) and some structurally related benzazepine analogues were synthesized and incorporated into peptides using solid-phase protocols. Radioligand receptor binding studies were used to evaluate the general opioid receptor affinity of the target compounds. The target constrained peptide (21) demonstrated an affinity for [H-3]naloxone-labeled sites (IC50 16 mu M) comparable to the corresponding leucine enkephaline analogue. (C) 1994 Academic Press, Inc.
Design, Synthesis, and Opioid Receptor Binding of Some Novel Benzazepine Constrained Leucine Enkephalin Mimetics
摘要:
An N-substituted 2-benzazepine, previously reported to possess morphine-like analgesic activity in vivo, was adapted for use as a constrained mimic of the N-terminal residues of leucine enkephalin. Molecular modeling was used to evaluate the suitability of the 2-benzazepine nucleus for this purpose. The principle peptide constraint structure, 2-(7-methoxy-2,3,4,5-tetrahydro-1H-2-benzazepin-2-yl)-ethanoic acid (8) and some structurally related benzazepine analogues were synthesized and incorporated into peptides using solid-phase protocols. Radioligand receptor binding studies were used to evaluate the general opioid receptor affinity of the target compounds. The target constrained peptide (21) demonstrated an affinity for [H-3]naloxone-labeled sites (IC50 16 mu M) comparable to the corresponding leucine enkephaline analogue. (C) 1994 Academic Press, Inc.